﻿#region Copyright(c) 2006 ZO, All right reserved.
// -----------------------------------------------------------------------------
// Copyright(c) 2006 ZO, All right reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   1.  Redistribution of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//   2.  Redistribution in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//   3.  The name of the author may not be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// -----------------------------------------------------------------------------
#endregion


#region Using directives

using System.Text;
using ZO.SmartCore.Standards.StringPrep.Properties;

#endregion

namespace ZO.SmartCore.Standards.StringPrep
{
    internal class DefaultUnassignedTable : UnassignedTable
    {

        #region Constructors
        /// <summary>
        /// Initializes a new instance of the <see cref="DefaultUnassignedTable"/> class.
        /// </summary>
        public DefaultUnassignedTable(char[][] chars) : base() { this.chars = chars; }


        #endregion

        #region Destructor

        #endregion

        #region Fields
        private char[][] chars;

        #endregion

        #region Events

        #endregion

        #region Operators

        #endregion

        #region Properties

        #endregion

        #region Methods
        /// <summary>
        /// Verifies the character sequence
        /// </summary>
        /// <param name="text">The character sequence to verify.</param>
        public override void Verify(StringBuilder text)
        {
            if ((text == null) || (text.Length == 0))
            {
                return;
            }

            bool result = false;
            char[] range;
            char ch;

            for (int index = 0; !result && index < text.Length; index++)
            {
                ch = text[index];

                if (Contains(ch))
                {
                    for (int i = 0; !result && i < chars.Length; i++)
                    {
                        range = chars[i];

                        if (range.Length == 1)
                            result = (ch == range[0]);
                        else if (range.Length == 2)
                            result = ((ch >= range[0]) && (ch <= range[1]));
                    }
                }
            }

            if (result)
            {
                throw new UnassignedException(Resources.UnassignedCharacters);
            }

        }

        private bool Contains(char actual)
        {
            char[] low = chars[0], high = chars[chars.Length - 1];
            bool result = true;

            result = result && (actual >= low[0]);
            result = result && (actual <= high[high.Length - 1]);

            return result;
        }
        #endregion
    }
}
